Furnace wall structure



Jan. 9, 1940.

G. W. DAVEY FURNACE WALUSTRUCTURE Filed Dec. 8, 1937 HIHII Patented Jan. 9, 1940 UNITED STATES PATENT OFFICE romance wan. snucrune- George W. Bail y, Worcester-,1! Application minims, 1931, Serial No. mama 8 Claims- (01. 12-101) 7 This invention relates to furnace wall structures, and more particularly to structures of the type having an inner wall of refractory material which is sectionally supported by an outer frame- 5 work. This application is a continuation in part of my prior application Serial No. 121,938, filed January 23, 1937."

It is one object of the invention to provide a furnace construction in which the inner wall is more firmly secured to the outer framework, and yet the individual tile forming the inner wall may be readily removed and replaced when desired.

It is a further object of the invention to provide furnace wall structure so arranged that the 18 individual tile forming the inner wall will remain in their proper positions despite large and heavy accumulations of slag on their inner faces.

With these and other objects in view, as will be apparent to those skilled in the art, the inso vention resides in the combination of parts set forthin the specification and covered by the claims appended hereto.

Referring to the drawing illustrating one embodiment of the invention and in which like refll erence numerals indicate like parts, 1

Fig. 1 is a verticalsection showing .one form of furnace wall structure;

Fig. 2 is a section on the line 22 of Fig. 1,

'with'certain of the inner wall tile broken away; I Fig. 3 is an enlarged view in section on .the line 3-3 of Fig. 1;

Fig. 4 is a perspective view of one of the bearing tileshowninFig. 1; and

Fig.5isaviewsimilartoFig.1showingamodi- 88 iied form of. the invention.

r The embodiment illustrated in Figs. 1 to 4 com prises a row of spaced vertical columns I! of I beam section to which are secured a series of vertically spaced horizontal beams II in the form of 40 channel members. The webs of the channel members are in contact with the flanges of the columns. A series of horizontally spaced brackets I2 are secured to each of the channel members II by means of bolts I4, and these brackets 45 are provided with ribs l5 (Fig. 3) which engage.

the heads of the bolts and prevent them from turning at assembly. Certain of the brackets 12 maybe located directly opposite the columns l0,

asshowninl figlandapairofboltsmaybe' spaced horizontal rows of refractory bearing tile l8 and for this purposeeach bracket is formed with a pair of vertically spaced flanges l9 which project inwardly at an upward inclination, as shown'particularly in Fig. 1. Each bearing tile '8' a II is of substantially diamond shape cr'oss-section, with upper and lower surfaces which slope inwardly and upwardly, the outer portions of the tile being located and supported. between the flanges i9. As shown in Fig. 2, each bearing tile 1 is preferably oi suflicient length, in a direction parallel to the beam H, to engage two of the brackets l2. lhe bearing tile are preferably secured to the brackets, and for this purpose each tile may have a pair of holes. extending vertically therethrough (Fig. 4), and vertical pins 2| may be inserted through these .holes at assembly, these pins also passing through aligned holes in the flanges 19, as indicated in Fig. 1.

The bearing tile 18 provide means for section- 20 ally supporting an inner refractory wall 23 having its inner or heat-exposed face spaced inwardly beyondthe inner ends of the bearing tile, so that these bearing tile are separated from the furnace chamber by a substantial thickness of 25 refractory material. The outer face of the wall 23 is located near the inner ends of the bracket flanges IS, the bearing tile l8 extending inwardly for a considerable distance into the wall 23 and preferably somewhat beyond the center thereof.

The wall is grooved or recessed to receive the .bearing tile. This inner wall 23 is constructed of refractory wall tile arranged in horizontal rows, and in the embodiment shown in Fig. 1 there is one row of wall tile 25 for each row of hearing tile I8. These wall tile are generally diamond shape in cross-section, with recesses 26 in their outer corners to receive the bearing tile, and their weight is supported by'the bearing tile therebeneath. A slight clearance space isshown 40 between each row of wall tile and the tile thereabove, and this space may be filled at assembly with suitable refractory packing material 21.

The bearing tile preferably extend inwardly for an appreciable distance beyond the centers of gravity of the wall tile, so that the wall tile 'will be held by gravity in the proper position.

If however, a heavy coating-of slag should adhere to the inner face of the wall 23, there might be a tendency for the wall tile to tip inward toward the furnace. In order to avoid possibility I provide means for securing the wallftile I Fig. 1 each of the bearing tile I8 is provided with a depending rib 29 on its lower surface which at assembly fits within a cooperating. groove 30 in the upper surface of the wall tile 25. The rib 29 is spaced outwardly a short distance from the inner face of the bearing tile, and the lower surface of the rib is semi-cylindrical, the groove 30 being correspondingly shaped. It will be'clear that by reason of .the engagement of the rib 29 with the groove 30, and the securing of the bearing tile Hi to the brackets I2, inward tipping of the wall tile 25 is effectually prevented.

In order to facilitate insertion and removal of the wall tile without disturbing the bearing'tile,

the rib 29 may be interrupted, as shown in Fig.

4, to leave a gap 32 having a width slightly greater than the thickness of the wall tile. The wall tile can be inserted through this gap and then moved laterally along the rib. Preferably, when the assembly is complete the joint between two adjacent wall tile will be in line with the gap, so that all the wall tile will be locked in place. Obviously the gap 32 need not be located intermediate the ends of the rib 29, but may be formed by omitting a portion of the rib at one or both ends thereof. r

In Fig. 5 certain modifications of the invention are illustrated. This embodiment comprises a -row of spaced vertical columns 34, and channel members 35 by means of bolts 38,- and each' bracket is formed with ajpair of vertically spaced flanges 39 which slope upwardly and inwardly. Refractory bearing tile 40, generally diamond shaped in cross-section, are supported by the brackets 36, and these bearing tile provide means to sectionally support an inner refractory wall 42. The bearing tile 40 are secured to the brackets 36, and for this purpose each, upper flange 39 is provided on its lower surface with a transverse semi-circular groove. 43 and each bearing 1 tile is provided on its upper surface with a transverse semi-circular groove 44. At assembly the.

' sembly with grooves 43 and 44 form a circular opening into which a short rod 45 is inserted to lock the parts together.

The inner wall 42 is constructed of refractory wall tile arranged in horizontal rows, each row of bearing tile 40 serving to support a lower row of wall tile 41 and an upper row of wall tile 48. The wall tile 41 and 48 are generally diamond shape in cross-section, with recesses to receive the bearing tile. As shown, each lower wall tile 41 has a recess' 49 in its lower outer corner, and each upper wall tile 48 has a recess 50 in its upper outer corner, these recesses being sufliciently deep to allow the bearing tile to extend inwardly beyond the centers of gravity of the wall tile. A slight clearance space is provided 'between 'each row of wall tile 48 and the tile thereabove, and this space may be filled at assuitable refractory packing material 52.

In order to prevent inward tipping of the wall tile in the event of excessive accumulations of slag on the inner face of the wall, a rib 53 is provided on the lower surface of. each bearing tile 48. This rib is diamond shape in cross-section and is located adjacent the inner face of the a similarly shaped transverse groove 54 formed in the upper surface of the wall tile 48. The rib 53 need not be interrupted, as was the rib 29 in Fig. 4, since the wall tile 48 can be inserted from beneath the rib, and the wall tile 41 can then be inserted beneath the tile 48. With this construction the tile 48 are locked to the bearing tile, and the tile 41 are held in place not only by their own weight but also by the weight of the tile 48 resting on them.

It will now be apparent that the invention provides an inner refractory wall formed of wall tile and sectionally supported by means of bearing tile which are protected from the furnace heat by the wall tile. The bearing tile are supported by a metal framework which is located entirely outside of the rafractory wall. The bearing tile are secured to the framework to prevent them from moving inwardly, and the wall tile in turn are secured tothe bearing tile to prevent inward tipping of the wall tile. The wall tile can readily be removed and replaced without disturbing the bearing tile. The entire construction is comparatively simple and inexpensive.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A furnace wall structure comprising an outer framework, vertically spaced horizontal rows of refractory bearing tile mounted on the framework and projecting inwardly therefrom, the bearing tile being secured to the framework to prevent them from moving inwardly, and horizontal rows of refractory wall tile supported by the bearing tile to form an inner wall and having portions'disposed between the bearing tile and the inner face of the wall to protect the bearing tile from the furnace heat, the bearing tile being secured to the wall tile therebeneath to prevent inward tipping thereof. 1

2. A furnace wall structure comprising an outer framework,-vertically spaced horizontal rows of zontal rows of refractory wall'tile supported bythe bearing tile to form an inner wall and having portions disposed betweenthe bearng tile and the inner face of the wall to protect the bearing tile from the furnace heat, the bearing tile and the wall tile therebeneath having interfitting parts shaped and arranged to prevent inward tipping of the wall tile. f

3. A furnace wall structure comprising an outer framework, vertically spaced horizontal rows of refractory bearing tile mounted on the framework and projecting inwardly therefrom, the bearing tile being secured to the framework to prevent them from moving inwardly, and horizontalrows of refractory wall tile supported by the bearing tile to form an inner wall and having portions disposed between the bearing tile and the inner face of the wall to protect the bearin tile from the furnace heat, each bearing tile having a rib on its lower surface arranged to project ping of the wall tile.

'4. A furnace wall structure comprising an outer framework, vertically spaced horizontal rows of refractory bearing tile mounted on the frame-w work and projecting inwardly therefrom, the

bearing tile being secured to the framework to bearing tile. At assembly the rib 53 fits withinf prevent them from moving inwardly, and horizontal rows of refractory wall tile supported by the bearing tile to form an inner wall and having portions disposed betweenthe bearing tile and the inner face of the wall to protect the bearing tile from the furnace heat, each bearing tile having a rib on its lower surface arranged to project framework, vertically spaced horizontal rows of refractory bearing tile mounted on the framework and projecting inwardly therefrom, the bearing tile being secured to the framework to prevent them from moving inwardly, and two horizontal rows of refractory wall tile supported by each row of bearing tile to form an inner refractory wall having portions disposed between the bearing tile and the inner face of the wall to protect the hearing tile from the furnace heat, the bearing tile and the wall tile therebeneath having interfltting parts shaped and arranged to prevent inward tipping of the wall tile.

6. A furnace wall structure comprising an outer framework, vertically spaced horizontal rows of refractory bearing tile mounted on the framework and sloping upwardly and inwardly therefrom, the bearing tile being secured to the framework to prevent them from moving inwardly, horizontal rows of refractory Wall tile supported by the bearing tile to form an inner wall, the wall tile being substantially diamond shape in cross-section and having portions disposed between the bearing tile and the inner face of the wall to protect the inner faces of the bearing tile from the furnace heat, and means securing the bearing tile to the wall tile therebeneath to prevent inward tipping of the wall tile.

'7. A bearing tile for a furnace wall structure comprising a block of refractory material substantially diamond shape in cross-section and having provision near its outer edge for securing it to a supporting framework, and a rib on the lower surface of the block near its inner edge.

8. A wall tile for a furnacewall structure comprising a block of refractory material substantially diamond shape in cross-section, with upwardly and inwardly inclined top and bottom surfaces, and a transverse groove in the upper surface of the block, the block having a portion projecting upwardly from its upper inner corner and a portion projectingdownwardly from its lower inner corner.

GEORGE W. DAVEY. 

